If Ice Maker Does Not Operate - Samsung RF4287HARS Service Manual

AW3 SM-EN 2011.3.31 2:56 PM 페이지83 in
TROUBLESHOOTING

4-2-5. If Ice Maker does not operate

1. Water is automatically supplied to the Ice Maker depending on temperature & time condition and Ice Maker
Dispenses cubed or crushed ice.
2. Power is applied to the one end of wires. Be careful when disassembling and shall refer to its exploded
diagram in any case.
3. Ice Maker operation shall be checked after pressing the Ice Maker testing switch.
(Fridge Ice Maker) It is not possible to check when the power is disengaged.
4. We recommend that TWO PEOPLE check the PCB and Ice Maker because they are located at front and rear
side each.
5. Be careful! The Ice Maker Heater can cause personal injury like burn.
Displays ERROR Code
MICOM(IC02) Operation Status
#37
(Test Switch)
MICOM(IC01) Operation Status
Ready Rotation
#39
0V
(Blade Ice Scoop)
#38
0V
(Guide Ice Full)
☞ Checking Method of ICE Maker Voltage
With typical PCB Ground REG1 Heater Sink and
1) Test Switch operation (press selected) : CN90-"2"(Black) shall be DC 0V.
Test Switch ready ; CN90-"2"(Black) shall be less than DC 5V.
1)Test Switch operating 1)Test Switch ready
☞ Checking Method of ICE Maker Voltage
With typical PCB Ground REG1 Heater Sink and
2) IC02 MICOM #39 voltage ; Ready(0V) → Rotate (4.9V) → Before
complete(4.9V) → Return(0V)
* MICOM #39 voltage is same as Connector CN90-"7"(Purple)
3) IC02 MICOM #38 voltage ; Ready(0V) → Rotate (0V) → Before
complete(4.9V) → Return(0V)
* MICOM #38 voltage is same as Connector CN90-"6"(Blue)
rotate when pressing the Ice Maker
Operation Ready
testing switch(over 1.5 sec)?
5V 0V
Before
Complete Returning
Is the input voltage of IC01
MICOM #38,#39 normal?
4.9V 4.9V 0V
0V 4.9V 0V
Is the water supplied in 6
minutes (After sensing ice bucket
Is the Ice Maker Sensor unit normal?
No trouble with PCB and temperature sensor,
Check the bad wiring connections.
Typical PCB Ground
REG1 Heater Sink
Start
Does Ice Maker
No
Yes
1) Replace the Ice Maker Kit
2) Check/Replace the Main PCB
input signal
(Micom IC01 Pin #37 - "0V")
No
1) Check the wiring connections.
Yes
2) Replace Ice Maker Kit
3) Replace MAIN PCB
No
fully)?
1) Replace the Water Valve
Yes
* Refer to the operation
condition of Water Valve
2) Replace the Main PCB
No
Yes
1) Repair the Ice Maker Sensor
* Refer to the solution "If Ice
Maker Sensor has trouble"
☞ Check the ICE Maker Heater & Motor Resistance
1) Measuring the Ice Maker Heater
resistance values
CN70-"3"(Black) ↔ "13"(Black)
Resistance value : 91(365)Ohm± 30%
83
Operating Condition when motor rotates
Operating Status of Micom(IC01)
Ready Operation
Heater Load(#85) 0V 5V
Motor CCW Load(#101) 0V 5V
Motor CW Load(#102) 0V 5V
Heater operates differently according to the
conditions. Test Mode operation will be 30 sec.
2) Measuring the Ice Maker Motor
resistance values
CW :CN73-"11"(Brown) ↔ CN70-"11"(Red
CCW:CN73-"13"(White) ↔ CN70-"11"(Red)
Resistance value : 3.5KOhm± 7%